Basic materials in music theoryPaul O. Harder, Greg A. Steinke · First published 1965 · Latest edition 2005Open the Tome
Bridge To Twentieth Century Music; A Programed CoursePAUL O. HARDER · First published 1975Open the Tome
Harmonic materials in tonal musicGreg A Steinke, Greg A. Steinke, Paul Harder, Paul O. Harder · First published 1968Open the Tome